/*
 * Copyright (c) 1999-2003, Carnegie Mellon University. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * 3. Products derived from the software may not be called "iVProg",
 *    nor may "iVProg" appear in their name, without prior written
 *    permission of Carnegie Mellon University.
 * 
 * 4. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes software developed by Carnegie Mellon University"
 */

package edu.cmu.cs.stage3.alice.core.question;

import edu.cmu.cs.stage3.alice.core.Element;
import edu.cmu.cs.stage3.alice.core.Question;
import edu.cmu.cs.stage3.alice.core.property.ObjectProperty;


/**
 * @author Ben Buchwald, Dennis Cosgrove
 */

public class ToStringQuestion extends Question {
 public final ObjectProperty what = new ObjectProperty( this, "what", new String( "" ),Object.class ) {
  //Rem @Override
  protected boolean getValueOfExpression() {
   return true;
  }
 };
 //Rem @Override
 public Class getValueClass() {
  return String.class;
 }
 //Rem @Override
 public Object getValue() {
  Object value = what.getValue();
  if( value instanceof Element ) {
   return ((Element)value).getTrimmedKey();
  } else if ( value != null ) {
   return value.toString();
  } else {
   return null;
  }
 }
}
